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Professional Rock Tumbler Kit, 22LB Extra-Large Barrel with Cutting-Edge Brushless Motor, Real-Time Motor Output & Runtime Display - Heavy Duty Metal Base for Adults & Rock Collectors

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Size: A: A3 22LBS Rock Tumbler


Features

  • Long-term heavy-duty use may wear belts over time. Request up to 10 extra belts at no cost by contacting our support team: . Were here to ensure your A3 tumbler always performs like new.
  • Serviceable Design + 5-Year Warranty Built, Not Disposable: All core componentsincluding belts, barrel, and drive partsare replaceable to keep the machine running at peak performance. Backed by a 5-Year Warranty and U.S.-based support, the A3 is designed for a 10+ year service life, making it a true long-term investment. If You Want the Best, You Want AtoRock Tumblers.
  • Designed by Experts Proven AtoRock Quality: Developed by a U.S.-based team with over 10 years of rock tumbling experience, AtoRock focuses exclusively on building reliable, professional tumblers. With a proven lineup from A1 (entry-pro model), A1 Pro (dual-barrel tumbler) to A3 (22lb heavy duty rock tumbler), every machine is rigorously tested and refined to meet the demands of serious hobbyists, collectors, and workshopsnot casual or disposable use.
  • Industrial-Grade Brushless Motor Up to 3 Longer Lifespan: The brushless design eliminates carbon brushes and dust buildup, dramatically extending motor lifespan. Rated for up to 40,000 hours, it offers up to 3 the service life of traditional brushed motorsideal for users who run their tumbler frequently or continuously.
  • Extra-Large 22 lb Single Barrel Up to 10 Higher Polishing Efficiency: The 22 lb extra-large barrel allows polishing up to 10 more material per cycle, reducing batch frequency while handling larger stones with ease. Reinforced construction with six metal twist knobs ensures secure sealing and stability during high-volume operation.
  • Real-Time Motor Output & Runtime Display (Exclusive Feature): An exclusive digital display shows total tumbling days, extra hours, and real-time watt output, allowing you to monitor motor load at any time. Even under full load, typical daily energy consumption stays below 0.5 kWh, making long-term heavy-duty tumbling both powerful and cost-efficient.
  • Full Metal Heavy-Duty Construction Maximum Stability, Reduced Vibration: Built with a reinforced all-metal base and metal-clad barrel, the rigid structure minimizes vibration and maintains stability during extended operation. Compared to plastic-bodied tumblers, this design delivers superior durability and consistent polishing results over years of heavy use.

Brand Name: AtoRock


Age Range Description: Suitable for ages 16 and above


Manufacturer Warranty Description: 5-Year Warranty Against Manufacturer Defects. Simply contact us at to activate and extend your coverage.


Manufacturer Minimum Age (MONTHS): 144


Set Name: A3


Manufacturer: AtoRock


Manufacturer Part Number: DSWRA3250901


Model Number: A3


Unit Count: 1.0 Count


Included Components: 2 Durable Belts, AC Adapter, Bearing Nuts x 2 & Thumb Nuts x 2, Small Pulley Screws x 2 & T-Handle/ Bearing Screwdriver x 1, Metal Rock Tumbler Base & 22LB Capacity Metal Barrel, Support Email , Warranty Card & Illustrated Learning Booklet


Educational Objective: To think like professionals — monitoring real-time motor output, maintaining stable loads, and achieving consistent polishing results with a machine built for long-term use.


Power Source: AC-powered


Supported Battery Types: No batteries required


Operation Mode: Manual


Indoor Outdoor Usage: Indoor


Is Assembly Required: No


Theme: 5-Year replacement, please feel free to contact us for any issue.


Color: Black


Size: A A3 22LBS Rock Tumbler


Item Weight: 11.29 Kilograms


Item Dimensions: 16.46 x 15.75 x 18.7 inches


Material Type: Brushless Motor


Frequently asked questions

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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Highly Recommend!
Size: A: A3 22LBS Rock Tumbler
The media could not be loaded. Outstanding product! Works great and holds several pounds of rocks, grit and water. On top of a great product the customer service of this company can't be beat...they are great to work with! Noise level is surprising low given the size and amount of rocks it holds. My 9 year old nephew and I really enjoy using this product. Highly recommend! ... show more
Reviewed in the United States on February 20, 2026 by Phil

  • Perfect accompaniment to the rock tumbler
Size: B: 4LB Rock Tumbling Grit Set
This kit is perfect with the rock tumbler. Really good product, really good company and great customer service.
Reviewed in the United States on March 31, 2026 by mike

  • Still working great
Size: A: A3 22LBS Rock Tumbler
So far so good. Been running 3 weeks no problems
Reviewed in the United States on March 12, 2026 by Dave Kloster

  • Very nice rock tumbler
Size: B: 4LB Rock Tumbling Grit Set
Cleans the rocks up real good but the more you tumble the ladder it gets. The first tumble wasn't loud at all. The second tumble was a smidgen louder and now the third one is a lot louder so I'm waiting to see how loud the polish tumble is but it's doing a good job
Reviewed in the United States on March 17, 2026 by clyde

  • Great product
Size: B: 4LB Rock Tumbling Grit Set
Daughter uses it in her rock polisher and they come out beautiful
Reviewed in the United States on March 26, 2026 by DeeDee Meyer

  • Follow instruction, DONT DUMP IN SINK, be patient it’s worth it!!!!
Size: B: 4LB Rock Tumbling Grit Set
It works really pretty well for the price. Not overly loud and after day 3 I stopped noticing the noise. Make sure you take your tumbler bucket outside to or use a strainer with a catch bucket the strained will help you contain the rocks white the bucket under it will catch the sludge. You don’t want this in your sink. I generally use a high powered garden house and strainer to clean then between cycles. And YES IT TAKES FOREVER, but that’s the process TRUST IT. I did the impatient test run and the rocks I let stay in the tumbler the recommended amount of time vs the ones I got inpatient with look CONSIDERABLY BETTER! ... show more
Reviewed in the United States on March 22, 2026 by Tonja

  • Solid, large, a step up
Size: A: A3 22LBS Rock Tumbler
So, this thing is huge. I have 4 other rock tumblers, all in the 4lbs range. This is considerably larger, and in some ways simpler. My other units have variable speed; and I still use them for polishing and fine tumbling. I've only had it for a few days, so here are my impressions: It seems solid and robust. The base is sturdy, large, and well lubricated from the factory (lots of grease on the bearings, which is good!). The barrel has metal rings and a rubber insert for the rocks which is quite thick. I ran it for 3 days so far, and the noise is a little louder than my other tumblers, but not from the motor - just lots of rocks tumbling. It seems to grind the rocks down much faster too; the larger amount of rocks in it means more weight and force. No leaks so far. The factory installed belt did break, but it came with a bunch of replacements, as well as tools and spare parts. It did a great job for only 3 days of tumbling so far. ... show more
Reviewed in the United States on February 6, 2026 by Jennifer Rowlett

  • Huge tumbler
Size: A: A3 22LBS Rock Tumbler
I wanted something bigger than my little double barrels but this is huge and difficult to lift when full. Lots of room for larger rocks but be prepared to use a large quantity of grit (36 tablespoons). Update: Tumbler at half full, but belts have snapped each week of tumbling. Extra belts are included and customer service is stellar at sending new ones for free (received one day after I emailed). ... show more
Reviewed in the United States on February 16, 2026 by T. O'Halloran

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